Cover Kratos in 500 buckets of blood by killing the enemies

Campaign: finish Crack the Sky

Campaign: destroy 1000 objects

Upgrade any weapon to the next level

Kill Poseidon

Forge the Armageddon Blade

Campaign: find 5 collectable weapons

Campaign: destroy 1 satellite uplink

Campaign: destroy 100 objects

Campaign: 50 kills with assault rifles

Kill at least 10 enemies with one Predator missile in Single Player or Special Ops.

Complete the mission in the airplane graveyard.

Take back Whiskey Hotel.